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€ *~ S l JAN 1 1 1935
( POTTSCO )
Uaht- Weight A^grejdle
HigA Insulation Values
High Acoustical Values
Plaster and Stucco Base
USE IT FOR
Structural Concrete Precast Structural Slabs
Fireproofing Precast Roof Slabs
Load-Bearing Building Units Partition Units
Bridge Decks Floor-fill
Nailing Concrete Roof-fill
and wherever else dead load saving is advantageous
Exclusively Produced by
The Pottsco Corporation
Quality and Economy
M. M. POTTS
Phone State 1340
( POTTSCO )
Used in some of the largest and most modern Government Buildings
The Pottsco Corporation
One North La Salle Street
&l Stucco Base
THE BUILDING AND CONSTRUCTION INDUSTRY:
This catalog has been compiled and issued in the hope that
the wide variety of data herein contained will serve to acquaint the
reader with the salient qualities and advantages of POTTSCO light-
No attempt has been made to provide accurate specifications
for specific work. Rather, this catalog serves as a general treat-
ment of the product and its uses. However, this company will, through
its general and district offices, provide detailed specifications for
We believe POTTSCO presents a product of QUALITY and ECONOMY
to the building and construction industry — a combination that will
be happily received by purchasers and users of light-weight concrete.
An earnest effort will be made by all representatives of
this corporation to serve the industry to the best of their ability.
The following offices axe established under
direct and competent supervision to quote prices,
handle orders and generally service the sale and use
Write the nearest office.
Chicago, Illinois - One North LaSalle Street
Telephone - State 1340. President, H. H. Potts.
New York City
U40 Broadway - Telephone - Lackawanna 4-27U-
A. tt. McMullin, New York Manager.
Washing ton. D.C.
510 Metropolitan Bank Building - Telephone - National 933'
L. K. McDorman, District Manager.
Newark. N. J.
60 Park Place - Telephone - Market 2-4917
J. Franklin, District Manager
Plants are located at - Chicago, Illinois -
Pittsburgh, Pennsylvania - Bethlehem, Pennsylvania.
Are You Interested in Saving Money on
Ycur Light-weight Concrete
SOME REASONS FOR USING POTTSCO
1. It is economical - the aggregate is low in cost offering contractor
2. Use it for:
3. It places perfectly and rapidly - still further reducing cost to
contractor for concrete in place.
4. POTTSCO floor-fill and similar concrete weighs from 70 to 75 pounds
per cubic foot. Wall load-bearing POTTSCO concrete weighs approxi-
mately 100 pounds per cubic foot,
5. It meets Federal, State and City building codes and requirements.
6. POTTSCO aggregate is entirely free from any elements which react
unfavorably to steel, iron or metal - no possible corrosion.
7. POTTSCO concrete is fire-proof.
8. POTTSCO concrete has superior insulation and acoustical properties.
9. High strength with minimum amount of cement is developed.
10. POTTSCO aggregate can be handled equally well through Ready-Mix or
11. Only one grade of aggregate to handle - no segregation - ready to
use as unloaded from car.
12. POTTSCO concrete has been used in large government and commercial
13. Producing plants, in conjunction with low freight rates, have been
established so that POTTSCO may be used on any job in a very wide
territorial area with BIG savings.
14. Summed up POTTSCO aggregate produces a perfect cellular, porous,
light-weight concrete at an attractive cost.
THE POTTSCO CORPORATION
One North LaSalle Street,
OFFICE OF SUPERVISING ARCHITECT
IH REPLYING QUOTE THE ABOV E SUB > q * * Yfi
BCT, BUILDWG. AND THESE LETTERS OA" AXl
July 1, 1933.
The Pott sco Corporation,
1 North LaSalle Street,
Referring to your letter of June 12th f the
specifications in use by this office for light
weight concrete fill in connection with the con-
struction of buildings under the supervision of
this office have been modified to permit the use
of material of the type manufactured by your
Jas. A» We^more
Acting Supervising Architect.
FROM SWEET'S 1934 ARCHITECTURAL CATALOG
THE POTTSCO CORPORATION
Exclusive Producer of "Pottsco" Lightweight Concrete Aggregate
One North LaSalle Street, CHICAGO, ILL
PLANTS IN CHICAGO AND PITTSBURGH
"POTTSCO"— AN INERT, CELLULAR, POROUS, LIGHTWEIGHT AGGREGATE
WEIGHING APPROXIMATELY 48 LBS.
Fireproofing Steel Col-
umns and Beams.
Roof and Floor Slabs.
Back-up Units — Load
( POTTSCO )
A Good Product That Com-
bines the Most in Quality
with the Most in Economy
PER CUBIC FOOT
Economical (first cost and in
High in Insulation Value.
High in Fire Resistance.
High Acoustical Properties.
Excellent for Nailing.
Good Plaster and
Smooth Finish and
Low Capillary At-
Where saving in weight is desirable for
reinforced structural concrete, Pottsco
may be used to decided advantage.
Specifications furnished on request.
A saving in weight of from 40 to 60
lbs. per ct- ft. can be made with Pottsco
as compared with ordinary stone concrete.
This feature offers the opportunity to
effect great savings in cost of steel.
Specifications furnished on request
Roof and floor slabs made from Pottsco,
possess light weight and structural quali-
ties. Pottsco precast slabs are manufac-
tured and supplied by various reliable con-
cerns. Full information furnished on re-
Approximately one hundred reliable
concrete products manufacturers supply
the trade with quality Pottsco building
units for load-bearing back-up and parti-
tion uses. They adequately meet the
specifications of building codes and the
American Concrete Institute.
Section of Structural
Section of a
Pottsco floor fill averages 70 to 75 lbs.
per cu. ft. with strength in excess of 500
lbs. per sq. in. This strength can be pro-
duced with a mix as lean as 1 :9.
U. S. Post Office, Chicago, III.
Graham. An demon, Piomt ft Whiti, Architect*
John Giiffiths ft Son Co., Builders
Porrtco was used throughout tors building as floor fill
Samples — Technical and Engineering Data — Quotations — Promptly Furnished
T)/^\HpnnQ /^/^V Lightweight Building
1U1 lOLU BACK-UP UNITS
Combine those rare merits of Economy and Quality
THIS IS THE FIRST OF A SERIES OF FACT STATEMENTS THAT WILL BE
PUBLISHED, IN AN EFFORT TO FAMILIARIZE ARCHITECTS, BUILDERS,
CONTRACTORS AND OWNERS WITH AN OPPORTUNITY TO IMPROVE THE
QUALITY OF CONSTRUCTION AND SIMULTANEOUSLY SAVB MONEY.
POTTSCO Back-up Units are good for the following reasons :
Low Capillary Attrmction
Sailing, Sawing and Boring
Direct Plaster and Stucco ba><
Light, Clear Color
Smooth Texture and Edges
Exclusively Manufactured and Sold by-
All of the following statements are made after exten-
sive research and proof— Technical reports are on
file and will be gladly furnished on request*
-OW COST: By favorable arrangements » with the
manufacturers of the lightweight aggregate from
which POTTSCO Units are made, and through our
own economical manufacturing facilities, we are able
to supply POTTSCO lightweight Back-up Units at a
cost, which will provide very substantial savings in the
total cost of construction as compared with other
materials or units adapted to similar construction,
and in addition give you a product that possesses
many other qualities, so essential to good construc-
tion POTTSCO Units are made in many shapes
and designs, so that we can meet your every require-
ment. Let us tell you more about POTTSCO light-
weight Units and give you a bid.
JGHTWEJGHT: POTTSCO Units are from 35 to
40% lighter in weight than ordinary concrete units.
The savings in handling and laying on the job are
very substantial — yet they possess a liberal margin of
safety in the requirements of the general and local
building codes, as to strength and compressive resist-
ance. Although very light, they are very strong —
and get stronger with age. POTTSCO Units are for
load-bearing walls and make ideal partition walls
OW ABSORPTION: The absorption of POTTSCO
Units is much lower than exists in competi-
tive products. It is so low that in some cases
these units have been approved by State In-
dustrial Building Commissions for outside
walls. We recommend them, however, pri-
marily for back-up work.
OW CAPILLARY ATTRACTION: Cap
illary attraction (the action which takes
place when the molecules of a liquid are
attracted by a solid, causing the fluid to rise
above its level about the sides of a con-
taining vessel), although the absorption as
above stated is low, occurs only in slight
form. This creates a condition that is highly
advantageous from the standpoint of elimi-
nation of moisture and dampness and im-
IGH INSULATION: The extremely light, po-
rous character of the structure of POTTSCO
Units, although sufficiently dense for low
absorption and capillary attraction, gives
a unit of especially high insulation qualities. These
units are almost perfectly immune from the conduc-
tivity of heat and cold. The structure is such that
under normal conditions the transmission of heat
and cold is negligible. Obviously, in buildings where
insulation must be provided for, POTTSCO Units
are especially adaptable, and their consideration
FIRE RESISTANCE: The ingredient aggregate, from
which POTTSCO Units are made, has initially been
fused at high temperature, so that the fire resistance
of POTTSCO Units is especially high. POTTSCO
Units have withstood successfully every fire test to
which they have been submitted. Of all their
qualities, none are superior to their fire resistance.
SOUND-DEADENING: The same qualities that pro-
vide for resistance of heat and cold operate to
produce a unit that is effectively sound-proof —
another worthy quality for Back-up Units.
NAILING, SAWING AND BORING: These quali-
ties, where they are required, are extremely con-
ducive to economy in construction and are generally
recognized as such. Ready proof of the superior
qualities of POTTSCO Units is always available.
POTTSCO Back-up Units used in Permanesque Homes,
Pasadena Boulevard, Milwaukee, Wis,
Furnished by The Economy Concrete Products Co.
POTTSCO Units are easily nailed and the nails
HOLD — a real advantage.
DIRECT PLASTER AND STUCCO BASE: The
smoothness and adhesion of POTTSCO Units make
a perfect base for plaster and stucco. The smooth
surface texture of the units contributes to saving
plaster or stucco materials and accelerates the labor
of application. The bonding or biting POTTSCO sur-
face insures permanency. There can be no chemical
reaction between the base, POTTSCO Units, and the
plaster or stucco. Furring and lathing may be al-
together avoided and that expense saved, if desired.
Decorative, colored wall finishes may be applied
with remarkable results direct to POTTSCO walls.
LIGHT, CLEAR COLOR: The general white ot gray
color of POTTSCO Units offers a pleasing wall, and
can be left uncovered with an effect that is artistic.
SMOOTH TEXTURE AND EDGES: The perfectness
of shape, edges, and surface contributes to even
joints and ease of handling and laying. Masons like
to handle and lay POTTSCO Units. There is no
patching of joints and corners. The entire wall sur-
face is true.
WE HAVE secured the exclusive manufacturing rights
on POTTSCO Units in this territory.
WE ARE prepared to furnish lightweight Back-up
Units of almost any size, of the highest quality,
at prices that will save you a great deal in your con-
WE ASK for the opportunity to talk with you and
show you conclusively the advantages, the economy,
and the high qualities of POTTSCO UNITS.
A Specimen POTTSCO Tile 4"x8 xl6
A good Back-up Tile and Partition Uni
Kalamazoo, Michigan — De Ha an Apartments
Another POTTSCO Back-up Job
Should Be Used F*
Armories, Auditoriums, Rinks, S tad tut
Pubtic Buildings and Institutions
Clubs and Lodge Buildings
Hotels and Restaurants
Commercial and Industrial Buildings
Stores and Markets
And wherever else there I
need for a SUPERIO|
BAG K-U P UNIT!
Want To Save Money?
Well— Here Is
One Way To Do It—
( POTTSCO )
Light- Weight Aggregate
POTTSCO cu * s ^ our cos * * or a " l'9 n +- we 'gh+
LOW COST per cubic yard
LOW COST of handling
LOW COST of mixing
LOW COST of placing
A Magnified Granule of POTTSCO
LOWEST finished cost-- HIGHEST finished quality
This circular is being mailed to outstanding
contractors to inform them of the paramount
features of POTTSCO — the one light-weight
aggregate that will enable them to cut costs
Other contractors are realizing
this saving so can you.
4y\<y e^ *y ^
& ■ -s>> ««*
POTTSCO Light- Weight Concrete Ajjt G
has been used successfully for the past five years
in all types of building construction » » »
NEW U. S. POST OFFICE
Canal, Van Buren and Harrison Streets
Largest Post Office Building
in the World
Graham, Anderson, Probst & White
John Griffith & Son Company
THE NEW CHICAGO POST OFFICE used POTTSCO for
all light-weight floor-fill concrete and it gave a first-class job.
Only one grade of aggregate to handle - - use
it just as it is unloaded from cars - -
POTTSCO Makes Good Concrete:
Hard - - cellular - - porous - - light - weight
(75 pounds per cubic foot up)
POTTSCO Cuts Labor Costs:
Perfect workability - - perfect bond ; _ _ nQ
harshness in placing
is Approved By:
U. S. Government, City and State Building Codes
«THE POTTSCO CORPORATION
Combines These GOOD QUALITIES
High compressive strength
Chemically inert (no corrosion)
Places and handles cheaply and well
THE NEW U. S. POST OFFICE AT
was completed with POTTSCO
as floor-fill throughout
Consolidated Engineering Co., Builders
J. E. Smith Co., Concrete Contractor
And here is what the contractor
says about the job —
J. E. SMITH COMPANY
1206 Sbiiman Av*muu
IiuNm weit Bin
19 3 3.
korlh U fell* St.
£*w Mr. jotiti
*nar> *a fora&ll7 :loj«d tha iootract #ith
furnlihirur "lottaco" for tha Naw Clo;lno»tl *ost (-fflie, .sj
tlatad tn«i Id Ulovlof 1600 lbs of totta:o to the ouoic yard,
that this louu lb». "ouU yiald from tan to flftaen parcant
aura ttLan ^n MlaaJ mfele yard of tatarla.1.
At tr.a tiaa,»» iu« rn»r a*eptlcal of >our »t*ta-
tad line* *a h»va coaplatad oar joo, ualn# ajj^r 3»tm*tal7
2^00 >d». 9f yo»r oialarlal.** find that tn« jlald It actually
Id. j-r-tater ,
*a Jx»u m littla difficulty at tha atari oj u»ir*r
too iu:h aatar and au«a?aat toal you caution your futura our:ru.aari
of ioit»;o to oa caraful aoout tnu watar contact. *a UKa j?jt
malarial aery aall, handlaa aery nloaly and ■• ha»a flcon Ifca*
bare p*aiad a w«ry r Wrld G:»erQaent loa^actloo.
.•>r> truly ysors.
3st Data on POTTSCO
Proving These Points
gth From 400 lbs. to 2000 lbs.
Per Square Inch
(depending on the mix)
45.7 Units Avge. Reduction
From 75 lbs. Per Cubic Foot Up
NORTH LA SALLE STREET, CHICAGO »»
( POTTSCO )
A GOOD PRODUCT - - AN ECONOMICAL PRODUCT
FOR MAJOR CONCRETE CONSTRUCTION
POTTSCO, a standard, recognized and approved product, is sold
exclusively by THE POTTSCO CORPORATION which makes
a genuine effort to give genuine service
POTTSCO'S BIG ADVANTAGES TO YOU:
Makes A Better Job —
Assures A Winning Bid —
And Saves You Money.
Samples — Technical and Engineering Data — Quotations
Ask us for Delivered Price
on any job you have or any
job you are bidding on » » »
The Pottsco Corporation
One North La Salle Street, Chicago
Telephone: Stote 1340
Tests and use have definitely proved that POTTSCO concrete
is the highest in quality from the standpoint of insulation of
any structural concrete thus far developed.
POTTSCO, therefore, deserves consideration in any type of
building construction where insulation against heat and cold
is needed or important.
C i Cechardt
fe»roh 26, 1929
H. I. Potta Cowpeny
228 north L>3*1 U Street
We eubw.lt herewith the results of teats »hlch we have
conducted to determine the rata of beat flow through your Tottaco-
Length, Inches 15-7/8-
Belght, Inohes 7-6/8-
T/UQ«nesa, Inches 8
Density; pound • par ou.ft. of volume 66
Hollow 3paoe; percent of total voloaw 42,2
Density of Aggregate; pounds par on, ft, 112.
fleet Conduct t THj Tt ,f
Id oonduetlog thla teat ** have uaed the flat plate method
which gives the Internal aooduotltlty of 'the attrUl, surftoe to
surfsee. In the data below we have expreeeed thla eoodaotlTlt y In
a.t.u.s per hour per eamere foot of wall surface pmr degree 'ahr. of
temperature difference between toe surface* of the wall for the 8
The temperatures on the two a Idea of the tile were aeasured
with oopper - edvanoe thermocouples attached directly to the aurfaoe
of the ttle. You wl.il note that the wan aide wee aelntalned at a
tempers tore of 100 degrees ?ehr, and the cold side at 45 degrees i»hr.
This «1mi a t emparature difference across the tile of S3 degrees Tahr.
and a mean or base tampsretore of 72.6 degree a ?ahr. The results are
Temp era turee - Deg. fwhr. Beet ConduotWlty
germ 31de Cold Side Dlfferenoe yen B.t.o.a per Hoar
J. C. Peebles.
aeapeot fully • abas It ted.
C *B H
^.° nA *OT
* li *i»* fit 1 **- —JE** ° e a.c^ h
te r «pJv » rj ls.
di -ct a ;r "•**• «„ n °: w - -'i« an •'•«« co „, .
1 eo *.r,
5 -1 * •*.
lc * 'Pe'co
This is the second of a series of educational papers on POTTSCO
light-weight concrete building back-up units, intended to acquaint
Architects, Builders, Contractors and Owners with an all-quality
A representative MILWAUKEE, WISCONSIN K« m ^
cu,, wi»^uiMMIV t nome^a type where quality is demanded.
POTTSCO back-up units are used throughout.
The following three pages tell why discriminating Architects
and BuAders use POTTSCO LIGHT-WEIGHT BACK-UP UMTS
= Exclusively Manufactured and Sold by-.
G F Gerhard r
M* « hami ai, K\r.iMi,u
March 2dth, 1929.
Ke submit herewith the results of tests which w« huve conducted to de-
!it flow through your "Pottsco" building tile.
. I n, Inches
ghf , lnrhes
T, pound* per cu.ft, of volume 65
nnt of total volume 42. Z
Density of Aggregate; pounds per cu.ft. 112.
Hoat Conluctlvlty Teat
m conducting this test we have used the flnt plate ruuthod which
rnal conductivity of the material, surface to surface. In the data
have expressed thla conductivity In B.t.u.s p>;r h >ur per square Toot of ~
■all surfaco per degree Fahr. of temperature difference betwoon tne surfaces of
the wall for the 8 Inch thickness,
-'ires on the two Bides', or the tllo were measured with cop-
. wance thermocouple attached directly to the surface of the tile. You
■ 111 note that the v.arm side was maintained at a temperature of 100 degrees Fahr.
->ld »i h %i |8 I groes Fahr. This gives a tomporature dlfforonce across
Ml ' '" • Fahr. and a mean or base tomporature of 72.5 degrees Fahr.
IU1U are as follows:
Temperatures - Dog. Fahr. Heat Conductivity
Warm Side Cold ftrtg Dlfforonce Moan B.t.u.s. per Hour
G. P. Gebhardt, Mechanical Engineer, ARMOUR IN-
STITUTE OF TECHNOLOGY, submits this report after
regulation insulation test on standard 8x8x16"
POTTSCO light-weight blocks.
This laboratory, recognized for its extensive and
thorough research work in the field of INSULATION,
was purposely selected to make these tests on
POTTSCO units, because it is to this laboratory chiefly
that insulation products are submitted.
The POTTSCO aggregate from which POTTSCO units are made is so high in INSULATION that it can be shipped in coal or
gondola cars during the severest part of the winter, wet and full of moisture and only a thin crust around (he sides, bottom
and top of car will form. THE COLD WILL NOT PENETRATE A CAR LOAD TO EVEN THE POINT OF FREEZING.
Is it any wonder then that POTTSCO units are high in INSULATION?
e0MP*M30M £f MEAT 1033 TRRODCH W*X1.3 Of H.MJU3 1UTIHU1.3
Graphically expressed, the relation of
INSULATION efficiency of POTTSCO units
as shown by above report to other struc-
tural units, based on general published re-
ports, reveals an interesting comparison.
POTTSCO walls are INSULATED
A Magnified Granule of POTTSCO
The fine, porous, granular, cellular structure of POTTSCO
aggregate when combined with cement, forms a hard mass of
sponges, filled with minute air spaces and sealed over with
cement, which kills the transmission of heat and cold.
The physical characteristics of this combination of cement
and POTTSCO sets up an impervious barrier to the atmospheric
elements and accomplishes the ideals of INSULATION.
HERE IS JUST A PLAIN, PRACTICAL PROOF
Vou can lay up a plain wall of POTTSCO units and apply intense heat to one side. Heat it to from 1500 to 2000 degrees F.
Bring it lo a red hot heat. Keep the heat applied for a long time. (These tests have been run from 4 to 100 hours.) Then
place your the opposite side of the wall and keep it there as long as you like. You will feel no more than a littfe
With what other structural building unit can this test be made?
If you tan have one side of the wall, say 1500 degrees and the opposite side say 150 degrees— a reduction of 1350 degrees in
say an 8-inch wall, what chance has the cold at say 20 degrees below zero to penetrate the wall? NO INSULATION MATERIAL
IS BE! ILK Hi \\ ITS ABILITY TO RESIST THE TRANSMISSION OF HEAT AND COLD.
UNDERWOOD HOTEL, WAUWATOSA, WIS,
Another reprc* >TTSCO back-up units
used throughout .
—-Architect A. L. Seidenseliwarlz, MilUHluli
WOMKWT W K"T< T i o«4l'A.W. EM
August 51, 1928.
H. II. Pott* Company,
Th* following Is" result or hc«t test, nuihorlsci
by your latter of August 25th, on two~f}x8xl6" Building
Mocks, which tcr« delivered to our laboratory by your rop-
The test performed was In the nature of » pro-
llsil nary observation, and no absolute temperature dotcnnln-
•tlons were made,
Blocks under test were surrounded to a certain ox-
tent i>y other blocks In order to confine tho ho*t as much as
possible and wore thon subjected to an air blast gas flam
for four hours.
«-es In immediate contact with tnc flono cajno
to a bright chwrry red which Is generally considered Indic-
ative of a t»»p*reture of about 1SOO dogrces FahrciAolt.
h» other face of the block was then not too hoc to bo touch-
ed tn tho hand.
While under 61mm n lit Ions the bionics wore
I with cold water. So cracking or spelling eff of the
blocks was apparent ["row the heat or from tne cooling by
'tfTWU^ ROBERT W. HUNT COMPAKV.
1NSULATION is basic.
INSULATION is the primary object of all building.
Housing has never meant more than an idea to separate that which needs pro-
tection, from the outside world.
The Esquimo's igloo, the gypsic's tent, the pioneer sod hut of the western plains,
and on and up to and inclunding today's ultra-modern, monumental struc-
tures, are examples of man's attempt to INSULATE from the climates and
elements of the Great Outdoors.
Because structural materials have not provided the full requirements of INSU-
LATION, special insulating materials have been developed, and worthy as
they are for their purpose, their use constitute an imposing added burden
financially in the total cost of construction.
WE ARE MANUFACTURING AND OFFERING POTTSCO LIGHT-WEIGHT BACK-UP UNITS FOR ALL TYPES OF
CONSTRUCTION IN THIS TERRITORY, BECAUSE WE CAN GIVE YOU STRUCTURAL WALLS
AND AT THE SAME TIME INSULATION AT ONE COST,
Some other advantages of POTTSCO
Light-weight and easy to lay.
Direct nailing or boring.
Plaster or stucco direct. Certain char-
acteristics make these units especi-
ally an ideal plaster and stucco base.
Structural strength (Get stronger with
Mo contraction or expansion.
Very low absorbtiou.
"si Picture of a Story'
Use POTTSCO units for
Armories, Auditoriums, Rinks, Stadiums,
Public Buildings and Institutions.
Clubs and Lodge Buildings.
Hotels and Restaurants.
Commercial and Industrial Buildings.
Stores and Markets.
lit cat res.
AKU WHEREVER ELSE THERE IS
NEED LOR A SUPERIOR BACK-
WE ARE THE SOLE MANUFACTURERS OF POTTSCO BACK-UP UNITS IN THIS TERRITORY AND ARE ATTEMPT-
ING TO RENDER A REAL SERVICE BY PROVIDING A SUPERIOR QUALITY PRODUCT AT COSTS WHICH MATERIALLY
LESSEN THE TOTAL COST OF CONSTRUCTION. POTTSCO UNITS ARE MADE IN NINE STATES.
A TELEPHONE CALL, A CARD, A LETTER, will bring a representative to see you at your convenience, who will give
you all the information you wish. We extend a cordial invitation to visit- our plant and office and discuss this remarkable
/'induct and its uses.
COMPRESSIVE AND ABSORPTION TESTS
The following reproductions of tests are representative of tiie many that have been made,
which establish conclusively that POTTSCO meets all the standard building code requirements
as to strength and absorption.
Copies of additional reports will be furnished on request.
PITTSBURGH TESTING LABORATORY
Ha H. Potto Co.
REPORT OF T«6T OF 3
MMTOin ■*• 5797
■ «. Ch 3661
^ - 0304
concrete Building Blocks
AnnbuBter. Aurora, Illinois
•.- Actual ""£t^"* *•!•#* t*~
^ Date **.
X^h»*s*.M Made °—
1 16.50X7.75 120.14" 35.50 84000
PITTSBURGH TESTING LABORATORY.
h . G. E. Johnston
STATE CAPITOL ANNEX
August 20. 1929
Alsted Mf*. Company,
We have a test report on teat of your 8 I 8 i 16 inch
three cell granulated elag oonorete block made on September
26th, 1928 and on which the compression teat was made on
November 1st, 1928.
The blocks were tested on the 8 x 16 lnoh face with
cells vertical. The blooks ware marked AJICO atenoillad on
According to the results of the teat your bloeka satis-
factorily passed the test required by the building oode and
are, therefore, acceptable for use in load-bearing and outside
walls in publio buildings and plaoes of employment in the state
Tours very truly,
The university of WisoonBln
College of Engineering Departmsnt of Mechanlos
Laboratory for Testing sate rials
April 6. 199.
Besults of Freezing ana Thawing Tests on Pottsoo Concrete Building Blocks,
■ate for the leonoay Concrete Froduota Co., Wauwatoaa, ffieoonaln.
The propose of these testa was to determine the effect of repeated
fret zing and thawing on the strength and absorption of Concrete Building
Bloeks made with Pott seo aggregate aad Portland cement, and also to note
the loaa In weight and the spelling or other corf ace deterioration due
to the freezing and thawing.
Twenty blocks, all 8x8xl6-ln., S call, were received at the
laboratory on January 10, 1929, all of the blocks having been sealed
by Mr. C. 1. Porter, for the Wisconsin Concrete Products Association.
The card accompanying the blocks states that they were aade on Deeescer
T, 1928; aggregate, Pottsoo, all through l/2-in. screen; 1:9 nix; Ideal
El ou. ft. batch mixer; 8 admits s dry, 3 minutes wet; Anchor stripper;
cured 18 hours In eteaa. All blocks were stencilled on the end with
the aanufaeturer's Berk, an Z in a hexagon.
Fifteen of the blocks were used in these tests, fire of then being
subjected to 100 reversals of freezing and thawing and then teetad for
strength, absorption and loss in weight, fire of thea being tested at
the beginning of the run for strength and absorption in the regular
manner, and ths other fire being bald In the laboratory until the freez-
ing and thawing run wae completed, when they also were tested far
strength and absorption In the regular aanner. The expectation was
that this would give an indication of the noraal increase in strength
of the blocks under ordinary conditions during the tias required to
complete the freezing and thawing on the fire blocks being tested in
The bleaks for each test were picks d at random as follows.
The twenty blocks were arranged in order of seal numbers and beginning
at the lowest number the first, fifth, ninth, thirteenth and seven-
teenth were aalected for freezing and thawing and numbered 1 to 8,
inclusive. Irery fourth block beginning with the second waa selected
for testing at the beginning of the freezing run, these blocks being
numbered 6 to 10, inclusive. Kvsry fourth block beginning with the
third was selected for testing at ths and of the freezing run, these
blocks being cumbered 11 to 15, inclusive.
The attached regular printed report blanks, sheets 1, B and 8,
give the raaulta of the regular strength, to Ids and absorption testa
on ths three sets of blocks, the absorption data given *»•««/•*..
blocks 1 to 5 being for the blocks before the freezing test was started.
Absorption on these bloeke after the freezing test was eoapleted was
also determined and Is given later on In this part of the report.
°* *te«!?3 r . «tort on block, tested before freezing begam.
I J I a m subjected to freezing and thawing.
Koonomy Cone. prod. Co., Freezing Test, #2.
Actual freezing aaa begun on January 1?, 1929 and was completed
on latroh £6, 1989. When possible the freezing was accomplished by
placing the blocks outside the laboratory, but when ths outside
temperature was not sufficiently low the blocks were frozen In the
laboratory freezer. 100 oomplate reTersale of freezing and thawing
were made, the thawing being accomplished by placing the frozen
blocks in water and leaving thea in this water until thoroughly thawed
out. The bloeks were saturated with water before being frozen for the
first time, being In water for 72 hours, and were always thereafter placed
In the freezing atmosphere immediately upon being removed from the water
in which they had been thawed. The water in which the blocks were thaw-
ed out was heated somewhat by running 11 vb steam into it, so as to
accelerate the thawing, but no attempt was made to raise this water very
much abovs the regular laboratory temperature of about 70°7.
In order to determine whether the blocks were completely frozen
or thawed as the case might be a dummy specimen of the same material was
used, in which a hole had been drilled to a point in the middle of the
thickest web, half way from the top to the bottom of the block. This
hole was partly filled with refrigerator nnohine oil having a low
freezing point and a thermometer of the Immersion type placed therein,
the opening to the hole being tightly corked.
Readings ware taken of temperatures a a ollows, the average of the
100 readings being given in each case:
Temp, of freemer at beginning of freezing, Av. 14° F.
• - 9 nd ■ 13
■ dummy ■ w • a 17
■ ■ water " beginning " tnewing, 76
• W ■ m al m 94
• dummy a m m s gi
Toward a the middle of the freezing run block 2 begun to spall on
the bo t to a faee, as aade, and this spelling progressed until nearly ell
of thia face had crumbled away to a depth of about one lnoh, after
ahioh this spelling practically ceased, there being very little deter-
ioration during the last fifteen or twenty reversals. This block had
a aouble oross (#) scratched on one and and the manufacturer states that
this was one of 1 lot of rejected blocks which bad been included in this
lot of blocks by mistake. In addition to the bad epalling of the bottom
of this block there was considerable surface deterioration on the sides
and ends to a maximum depth of about l/d-in. , the total area so affected
being about 100 square lnchea on the aides and ends. In order to make a
strength test of this block it was necessary to build up the damaged
faoe with a 1:1 Luani te mortar, and it will be noted that this block waa
the only one tested which was below the 700 pounds per square inch re-
quired by the Code, either before or after freezing, and also that It
was the only block having a material loss in weight after freezing.
Of the other four blocks that were subjected to the freezing test,
there was some surface deterioration to s depth of only about 1/16-in.
or lees, and this did not show up at all until about 90 reversals had
been made. The area affected was approximately 25 to 30 square inches
for block 3, 50 equare lnchea for block 1, and 75 aquare Indus for
block 4 and 5, moat of it being on the ends or the sides near the ends.
Eoonomy Cone. Prod. Co., Freezing Test.
The data for absorption and loss in weight of blocks 1 to 5 after
freezing la as follows:
Block Weights after freezing
In dry weight
It will be noted from the strength tests that the strength of the
five blocks 11 to 15 which were stored In the laboratory and tested at
end of the freezing period was less than the strength of the blocks
6 to 10 which were tested at the beginning of the freezing period.
While blocks cured in steam gain in strength only very slightly with
age there should be no retrogression In strength. All of the blocks
were tested on the same machine and in the same manner. An examination
of the dry weights of the various blocks indloates that the strength
varies with the dry weight whioh shows the value of good tamping and
may account for the strength difference mentioned. Bloeks 1 to 5
which went through the freezing test had an average strength of 1064
pounds per square inch and an average dry weight of 34.0 pounds,
defective block 2 being omitted in each case; blocks 6 to 10 whieh
were tested at the beginning of the freezing run had en average strength
of 1082 pounds per aqimre inch and an average dry weight of 34.9 pounds;
blocks 11 to 15 whioh were tested at the end of the freezing run had en
average strength of 973 pounds per square lnoh and an average dry weight
of 34.0 pounds. (Comparisons should be on the basle of dry weights as
the weights given under part B of the reports were not all gotten at
the same time.) Certainly In the ease of blocks 1, 3, 4 and 5 there Is
no indication that the repeated freezing and thawing had any bad effect
on the strength.
Detailed data of the dates and hours of each reversal, with the
individual temperatures, etc., together with a sketch of eaoh block
showing the extent of any surface deterioration, are on film in thia
Paul T. lor ton, Jr.
Asst. Prof, of anohslnloB,
62A Engineering Building.
THE UNIVEBSmr OF WISCONSIN
0GMBDH1 - MTA«T1M*T Of UMMAMKB ShSSt 1.
L*bar*t«9~T fv T*»tfcM MfctM^tJto
t „ T-ta , ^tt— Or "- l*** 1 * ^ "**»■ to^Tn, e^^ r .in.. i ..3„oeUe-_-
fa-pfa. .fa- fa o fc .«..J!«i«.«*.JKi^- I n— «»
farfa ■ farfat ..)■?** — - - """"
M m iua. . JLJjB.AAMnA^.JllfBCtlJltat. .fta..s»A» -
i/e-ln. noTOsni 1:9 nix: lassl 81 ou.ft. bstoa «lx«. 3 ninut.s dry.
8 nlnutts Mt; An»n.or •tripper; euroo. 18 houri In ittifc
fhnoo fl»s block. ploksc *t mndon fron lot Mt for fnnlns tssti, and
Watoa it Um frsszlntf tost *»t bs«un on othsr blook*.
.BsUrla..AMfl f ..Mll* TJBttl«kl
i J I
vm. ' iimt
.7*7 I. .7
.8*0.118.. 7.8 8.0*11*75
UtrfT UB^O. ...
ife» «o«pl*t* *n«nx;. Afi
(O VOIDS 1
p. •i«-w-l*r ftsA
Hfltit (14 .01 -
fe4 Af»rsaalana J.3«*.» ( 8* \i .
.....A . .
W**M ito i»|y*«
Ww^TTVCot W lb./Wu.ft. Absorption lltlt tW
,u*w »__ *«*rj 13. tsifL J
. «. «•—•» «f .1 MM ■
—- - ->- -Kauu... •*«*>- *"- LSbSBSS* " -
»•- fiTO blook. a ,-fa** .* _ . " *" **••■•
1 ^"i^s±ft f M — P-S pi-^i*— •
*«* or *«»>, , <C> VOIDS 1
••*- «-. m >»j _i~ ism «~ r - 1 *
I cu ~- ■ — -f*'-**»*lii.«a4M; i_
A -' l,k ' -J— j«ji -ITT "■+ •■»-— 1
the UNrvsssmr of Wisconsin
nrtor **~nl H *WVJW»« I t T ar r olT?« «■ »«K»t m nb.arjtio
- ^*i. » ,
JU T B , ar H taut 9 nr. lAl t »- -i™.J 1I)W *io
^TZJX? ZnV' bmm — ^jr* 1 tox *•-
Q * n " 8»ljd^ (J4.QJ »^ * KJ * m » -»■»-■ <**-
*• «V.MUa J.nsM.I iz^, «... _ i *■ ■• •■•
=-.■= S 2! -- 2
ROBERT W. HITTT COMPANY. ENGDtZKKS
cmicaoo m-rsBV-noji mTau
ANALYSIS OF "POTTSCO"
November 10, 1930
r,«** 23932-2 w* B-20110
H.H. Potts Company
hv f ho » » A ^ple Barked "Pottsco" was submitted
by the H.H. Potts Company to our laboratory for
Analysis Water Soluble
% Total Solids 1.340
% Chlorine Traee
% Sulphate Trace
% Sulphides Trace
Analysis of white SamnTP.
I ? 1U "*;: ••••• 34,00
% Iron Oxide 4.95
% Aluminum Oxide .' .* 14^05
* Calcium Oxide 38 63
* S«inP^i U n P ^ de - 2 '- 42 (Calculated fro*
X Magnesium Oxide... 3.24 Sulphide Sulphur)
% Loss on Ignition Nil p ;
% Sulphuric Anhydride 1.42
The water soluble analysis shows a very
small percentage of soluble matter. The low percentage
of water soluble as well as the neutral reaction
indicates that the sample submitted would not cause
^nt^J ^ T!! en V%* as an a 8« re gate for concrete in
contact with reinforced steel.
Hot^^™*? Piece af polished steel showed no ooticecble
deterioration on being placed in boiling water con-
taining portions of pulverized "Pottsco".
ROBERT W. HUNT COMPANY
Plummer Technical Director,
Chemical k Metallurgical
PITTSBURGH TESTING LABORATORY
It mo Ch-5823
COKPRBSSIOI AHD PTRB TB3T3 OP P0TT3C0 COSCRETB
L**od*Towr no 163521
August 25, 1933.
PITTSBURGH TESTING LABORATORY
uioMTour no 165521
fili no 6774,3
CORPORATION 1 SORT* LA SALLE STRZST, CHICAGO, ILLUOIS
MDE NO. 2
1-6 By Voluma
PURPOSE OP TESTS
Tha forego lag types of test wars conducted for
£3T»p of Pottaeo concrete In varying proportion, of
Pott a co material.
Tha fire testa were made for determining the
protection which Pottaeo concrete. In the same *«TLug
£oanti, would afford atructural stssl ahape. embedded
PESCRIPTIOB QP TEST SPBCIMgSS
COMPRBSSIOS TEST SPECIMEMS
Por the compression teat 6* % 12" specimens were
eaat In the preaence of a Pittsburgh Testing Laboratory
inspector, three different mixe. being .el acted and two
cylinders of e.ch mix prepared for teat In the usual recog-
nized manner covering this type of teat epecimen.
There were three different mixes uaed in the
preparation of the cylinders, ae follows :-
mi SO. 1 - - - 1-6 By Volume
Cement -One Bag (94 Pounds)
Pottaeo aggregate - 8 Cu. Pt. let 48
pounda per Cu, Pt.J
Water added - 7 Gallons per bag
Cement-1.16 Bag. (109 **«;•> ( t 48
Pottaeo Aggregate - ^f^^?
Water Added - 7.™ Gallons per bag
MIX HO. 3 1-4 By Volua*
Cement-One Bag (94 Pound.)
Pottaeo Aggregate - 4 Cu. Pt. (at 48
pounds per Cu. Pt.)
Water added - 5 gallons per bag
A sieve analysis of the Pottaeo aggregate used in
each of the foregoing mixes is aa shown belowt-
PIKE TEST SPBCDCEHS
PITTSBURGH TESTING LABORATORY
o«o.« no Ch-6823
USONtlORV NO 165621
The fire teat apeclmons consisted of three block,
of Pottaeo concrete each 10" x 10" x 14* on a side and rep-
resenting the three different mixes aa uaed in the prepare-
tion ofthe 6* x 12 1 cylinders tested for compression strength
These fire test specimens were cast around a 6* x 6 E" colum
. . . n- m- «_*.*. m„A *~.y*mAAmA n»rHr«nv in the
These fire test specimens were cmi wouhu • o * «
weighing 21 pounds per foot and embedded vertically In the
center of the block, with respect to the long axis, the be^
extending to within 2" of the upper and lower surface of the
block and the ends of the steel beam protected by the concrete
which was brought flush with the top and bottom face of the
PITTSBURGH TESTING LABORATORY
LAeoftATOKr no 163621
The compression and fire teat apeclmens were t
to our laboratory where they were allowed to cure In open air
at room temperature for a period of 28 days. At the expiration
of the 2e day period the blocke ware thoroughly dried out in a
heating hood until they had reached a conatant weight after
which period they were lasaedlately tested.
COMPRESSIOS 3TKES0TB TEST
Compresalon strength teata were made on each aet of
oyllnders submitted, one of each mix beln? teated in the usual
manner by crushing at the rate of .06* pel -.lnute and tha
ultimate strength determined. The mate to aach cylinder waa
teeted for modulua of elasticity aa wsll as ultimate compres-
alon strength. It is mentioned tha'- . crushing test waa
made cm the same day as the companion fire teat specimen waa
taated, ome days time being required for each fire teat, as
described. Reaulta of compresalon atrength testa are
OflefMtBSSIOS TEST OP 6* 1 12* CTLISDHRS USTJO POTTSCO AGGREGATE
MODPUJS OP ELASTICITY OP COHCRBTE
CTXTJEm CRUfflUG ID AD
LBS. PER SQ.IS.
LOAD HO. 1
LMR. PER SQ.IS.
METHOD OP C01DDCTIHQ
1166 - Average
1626 - Averag*
2102 - Average
a Theee cyl laden used for the determiaetlcm
Bach of the fire test specimens were, In turn, tested
for fire resistance by pladlng them in a gaa fired furnace and
heating specimen In accordance with the recognised practloe
epeclfied by the American Society for Testing Materials, the
time temperature curve being followed, which curve cowera f'.v
test* for building materials.
Thermo-couples were pi seed at point a indicated at
the lower right hand portion of blue print diagram*, figures
1, 2 and 5, attached hereto, and tha temperature recorded by
means of a Potentiometer at frequent intervale during tha
By reference to theae dlagrama
that the American Society for Testing
is shown in dotted lines.
it will be observed
♦•rlele ideal curve
After placing each block, in turn, in the gaa furnace
with the thermo-couples welded to the ateel et polnta 1 and 2
and embedded In the concrete at point S and properly Insulated ,
the temperature waa gradually ralaed in the furnace and eon-
trolled, ao that it matched, aa nearly ee possible, the ideal
curve es shown In A. S. T. a. Specif lCbtlona C19-26T, which
covers tentative specif lcatlona for fire teats of building
construction and materials. It la mentioned that theee spec-
ification, are similar to thee* which have been approved by
PITTSBURGH TESTING LABORATORY
OftDE* No Ch-S823
Li«OK»'0»T NO 163521
the American Standard* Association and which are followed gen-
erally Is similar investigations.
Attached photograph, Plata m k m , shows th© appearance
of block* 1, 2 and 3 with insulated thermo-couple leads, prior
SUMMARY 0? RJB3ULT3
Results of compression teste lndloate a unit oomores-
slon strength ranging from an average of 1158 pounds for a 1-6
■ix to 2192 pounds for a 1-4 mix. the strength of mix Bo. 2
averaging 1626 pounds or midway between that indioated for nixes
1-4 and 1-8.
The sane relationship also holds good for modulus of
elasticity ralues, the values ranking in the same order as the
ultimate compression strength of eaoh mix*
Tests wore discontinued when steal temperature reached
1000°f. ia view of results made by th* Bureau of Standards in
load teats under heat of Gypsum protected columns. Results of
these tests which appear in th* Bureau of Standard*, Journal of
Research far June 1033 and indicate buckling when the temperature
of the steel had reach** 600°?. to 1200°?. Prom these results ve
considered that failure would haws occurred at a flange tempera-
ture of 10OOOF.
APPEARANCE OP BLOCKS BEFORE FIRE TEST.
The following conclusions may he drawn from the results
of these tests :-
COMFRESSIOB STRgBOTH TB3T3
A. An average strength of 2200 pounds per sq. in.
is indicated for Pottaco Concrete when mixed
in the proportion of 1 part of cement to 4
parte of Pottaoo by volume and using 7 gallons
of water per sack of cement .
MODULUS OF ELASTICITY
A. The modulus of elasticity In compression of
Pottsoo when mixed in the proportion of 1
part of cement to 4 parde of Pottseo by vol-
ume and using 7 gallons of water per sack of
cement, averages 1,250,000 pounds per eq. In.
for working stresses up to 750 pound* per sq.
la. This would give a value of *H* for en-
gineering calculations of 1 to 24 where "»• la
the ratio of modulus of elactielty of steel to
A. The difference between the mixes in the fire
teet are not a* marked as the variation in
result* obtained in the compression strength
testa. The elapsed time for the temperature
to reach 1000°P. at the flange of block l*o. 1,
representing a 1-8 mix by volume, was not very
much leas than the time r-quired for the flange
of the "H" beam to reach the same temperature
in block Bo, 3, the latter representing a 1-4
It would appear that if Pottaoo Concrete ia intended a*
a fire -protecting material only, that a 1-8 mix by volume would
anawer the purpose almost equally as well as the richer. 1-4 mix
by volume. *
On the other hand, however, we would recommend the Pottseo
1-4 mix by volume in case the concrete is to be used for load bear-
PITTSHraOH TB3TIJ0 LABORATORY
The accompanying report on sound transmission made by the Riverbank Laboratories.
Geneva, Illinois, probably the outstanding authority on acoustics of building materials,
while shown in technical form, interprets itself to establish that POTTSCO has high
acoustical properties and POTTSCO light-weight concrete deserves full consideration of
its merit wherever acoustical qualities are needed.
^^n^V€t/ f %^^
Report on Sound Transmission Teats
POTTSCO Block Partition
H. H. Potts Company
The partition was built in one of the openings of the
Sound Chamber of the Riverbank Laboratories, of the 8x8x16"
POTTSCO block, laid in lime and Portland cement mortar. The
blocks were plastered on each side with a brown and finishing
coat |« thick, of gypsum plaster. The tests were conducted
TX° l nE t0 fc J e * tan dard Reverberation Method employed in this
}nl ™ Py, . and ** sc F ibed in various published papers. The follow-
JFtffi 1 tonni% 8 mp5 e oy 1 ed° garithmiC radttctl » f *^ "' •«* <*&
Frequency, Reduction Fact or Sensation Unite
3r square foot. lini ahed construction
was 56 pounds per
The accompanying testimonials are representative of what all
users of POTTSCO think about it
\ lot** 1 U " 1\1.
v.tfc y»» lPf
1200 >*»• " .. .r.. •*•»* " -..ef
,„, W*W ''*'•
. \ t«*» "*"
ECONOMY OF STRUCTURAL LIGHT-WEIGHT CONCRETE
The following quotation is an extract from report of
Committee £06, American Concrete Institute, Frank A. Randall,
outstanding structural engineer, Author-Chairman:
"The additional price that profitably
may be spent for a lighter weight concrete
in order to reduce the cost of structural
frame. For example, it would be worth while
to pay 10 cents more per cu. ft, (2.70 a
cubic yard) to secure a reduction from 150-lb.
concrete to 130-lb. concrete in a concrete
frame building thirty stories high and a
reduction to 115-lb. or 100-lb. concrete in a
five story building, depending on whether the
floor was of solid slab or joist construction.
The savings are more favorable in the steel
We are hopeful that the data developed
will prove of value."
i .> J J^X5
f" ,Ttl ' rH — » »• Id U < f *"
-MK-3 4CC. *
•v. first »i
••* *■ bi»» w c8ic «? 5S"** * *
». w^ rr^
ft J(( **»#%|
* "i, ,JJ" '*■
int o •,►,
::s ;9E-I ZZ^S'--" BH
mlf» Jin II W 'T 'l
r m i- XaMiWfc* ■* «■
_i »._^ .. . IC ■ ^
»-. — - ■■ • • - •*
■ _:»i •- BM
i i I ■
ADVANTAGES OF LIGHT-WEIGHT AGGREGATE
The following reproduction Is the result of an exhaustive
investigation made by Mr. H. Herbert Hughes of Washington, D. C.
regarding light-weight aggregates, which analysis speaks for
itself insofar as POTTSCO light-weight aggregate is concerned.
Scope ot tn lndustry
*H.H-~* h ? h«
D «c«ss^ sSs.iis Saws A? -^rss
. sT REET
Cnic 4 .„?' «Pfoces s » 1 ov ««onie tfc ° d ,ts W -!, i been ma
and roofin. . ""« «s Use . **' masonry ,.„ P'faenf p„;. re,a, oed on
P^Pose, 8 ' but "* e 001 ^ n Poured co r ^a. Tes^"^ ia ««.»
- --^^C- /5s^^SpS?ipSt-^
• olu,n °«tpuT7 peoed '» ft.^ 8 P 61- *»y * ffia «m Um h08e P'an (s
o^ %>T toos 4> *«; . A c ond ^tf p ; c,,y °< £
COMPARATIVE COST OF
ICO BUILDING UNITS IN THE WALL WITH
" TILE IN THE WALL
What Is a Fair Market Price
for Light- Weight Units?
A Canfal Aa-Jr-ia of All Factor* Affecting «•»* Sale* Flgmr*
By H. H. POTTS
N .'»rr prtfrrrt'iul buildinc code feilrie
tiara cam in e particular locality
Ordjnarr rU, lik lor backup ha» en-
iared the edranta«t ol being the fin!
>f tool indoacry and they
COST OF LABOI AICD UOKTAH FO THOUSAND
— ace. labor, hob la- m. coacrelc inula, per U
_ -> demonitrate the Mum bbor. 5naal2.ii! day tile, pr- M
narked «™«n. dan caa be cflectH by Mortar, eoacntr un,<
aJb«nut.r« a larger hollo, an* (or the Morter. cfay liW (6 ea. It i
aaaalfer a»M bncfc .nit TW ..end ol the S^?5 ! SS" £~ ""J* """"^ »" «* S" °* ■*- "
Number of SaBali-.iv a
ft per lQOaa.lt.) per M
r 100 ib, lt( par M_
-equired per aa. It ol wall
!• required per m It ol waTL
* for b
r ed>«nt ol light -areifht
in Ihu trend
»d and today tfcay If*?:" < "^JTaS CV
. a. ih. i— t.™ ._.. Mortar, L I anita fi IJOM.
e in the backup unit Uorai. U omu S 0095
held Becauar clay lik led the building in- ' " """ *
ird the uat ol hollow anna lor Total labor and
i material Mill hold* the major Sarin,
i thai claa* ol nD eon-
corr or L*aoi awd moktai hi to rr-t m wall
_ . Coaeme ul« da* tfla
— ta»<»#7tla. . -J eta.
An attempt was made In
the accompanying article to
set up on the basis of 1930
prices, a ready and quick
comparison of the cost of
P0TTSC0 walls with hollow
The theory of the
calculations Is adjustable
to the basis of prevailing
prices governing both prod-
Because of the design
and size of POTTS CO building
units displacing smaller
units of other products;
the ECONOMY" of POTTSCO walls
Is reflected In labor and
In addition to actual
lower wall costs, the added
qualities of POTTSCO walls
in the form of insulation,
acoustics, nailing, direct
plaster base, etc. are de-
Data on these features
appear elsewhere in this
™-r, >.. iaM, ra. |/ M rafc »,| n ». r Ciiir«e,» n d M C,. Wbaab. Keller, mpenar |Jj
General om t m l maaaai 1 A
•« direct comae, a* .he owner, ol the MrM*. labor «!!„, 4llrb-M1 ^ w . Safcr. capraa, lrl ,
at loat.iy the added BBB\ «ith the mull thai
anWaai eaeee art grant I v
ThroaShom the central oate^. driiverad
anew lor SataU-n. clar nle Una tie it •**"*• *• *• aornaal Moaaw ol ordaamr, . . — °— "~»to*^ad ctanaanad ea-
mm, _eo--« lor baetop, r^ bet^-a ^"1^'^^'' ** "—- "* — ^^Jf?** ,"*" ^v™ ™" - '*
W-itWa-F m n aajnl aVIereace to tf» "* »»«». «*arta-, oeerbaad coal m^> dat £JZ.TJ^T ** —*t ~J
»" «abfe da^a rha. the ^-nbtH —- » - —rh at J0» Foe exana-le. ^.^ — ** JJ ' mww * * tata -» «•
WKOO OORf senrpts to assist manufacturers, dealers,
and others In building ml rain tal ring the prestige of POTTSCO at all times, by an
advertising campaign through representative and prooer mediums.
Below 1b reproduced specimens of advertisements taken at random
which have appeared from time to 1 1
POTTSCO onuuii no toiuble *ulphur and
le»» tulphuric anhydride than Portland cement
itactl In (act a chrmiu] analrei* \A POTTSCO
parallel* a aimilar enalrai* of Portland cement
A report of MM on POTTSCO bg the R. W
Hunt Company prove* that it contain* no in
gradient* «rhlch c-n in any way injur* atecl or
other tu.il.ri material* A paragraph in the
Hunt report road* a* follow*
The low percentage of water tolubl*. a* well
a* the natural reaction indicate* the'
plea aubmittad would not cauaa cotroaion whan
uaed a* ar. *tc ,r t'" 'or concrete in contact
The report elate*
I A polUhad ue«i ahowad no notice
■ bU deterioration on being placed In boil-
ing wate.- containing portion* of pulvaricod
f'aralltU Portland Oment
POTTSCO . being uaed for mon<
we .girt mum an mm o* the large** and
MM important building* for the U S Oovam-
r^uall. wood for ».*..•*** wrm.
UMi .1 Hard and I r*.4«ll,»e
H*S> an C ■■■rwalvr |
*eW ««- w. rwleW r~. .f ta» gww**, hear*..
I N*wth U ftatt* St. < l... «.„
LIGHT \l I M,HT AGGREGATE
Architects ana 0TT8CO fulfills every requirement as
proven prod, ■ . Jg £J actual fieS
has given cot-, ' "
important buildn . ,-ral f
the largest Post Office
States POTTS r
light weight wit, > ' — s^
strength and load bearing rah* (POTTSCO)
Contractor, like POTTSCO !*..,« Ur^^rTTiSiaU
of iu tan workibil.iv .,.,. « ° ° JTTT*™
of iu ea*y workability. ffta , r , ylc
Ubor saving, low hrit co»t 43J ,
at all temperature*.
■ ligli lti-ulMlirtt Value
' • ■ IRlll
' r.ualiral Valae
itj uf all Tem prra lures
« iu WLvirui
Chicago or Pitts-
Ik,. >.,i .,. bur^h at l uvv fr e ;gh. r A tes. in quantitiea
la can htrnt .
TBI- FO, ISro (HHHH(MIOV
Ah V.nb L* *.«n.
A Proven Product
New Low Cost
ArCni '' ittCTB
*/« specify™,; -rid using POTTSCO
today because .t Ig a tested product
and ha. g.ven complete satisfaction on
numerous important bu
Everyqual.ty you want m , lightweight
aggregate is found in POTTSCO
*'" L ' *.*....,.
Um,U "°" wort™
Ii ha. tested inwiUtion and acoust.cal
value uniformity ., .,, temperature,
•nd no segregation m miaing
I - J *
T., a «^-P»W.
POTTSCO fuJfUU ever* r-«
— , iu „
ShaiiR Hiprh Efficiency
AT LOW COST
Used in the New
Chicago Post Office
POTTSCO u*ed h the large* po* otfc-r .n thr
nrm o — .,■...,.. i
rompreeane Hrrngth, great inflating Bl
tical »,| u . High .n msublion and low In ro«f
Good for back-up block and p.r..,,„ ,,|, ., mr ||
a* for n.
l-und-bearinp- Building I nil*
Part. lion Tilr
I Is-** ..
I"- freight rale* in ajuanuUr* frum .*rlu«d up
The PolIt.ro Corporation
°"' V «rtn U ".all, Su^et
THE KALAMAZOO GAZETTE
Your Neighborhood Concet
Owner Management Personal Contact, Prompt Courteous Service— Low
lilllltl M lltllllllllllllf Illlll M If II II M 1 1 1 1 tlltf III II i;il|||||||||||||||MI|tll||||llllllinilll|IIIIIIIIIMII
SOUTH SIDE ATLD SOUTHWEST SI
PUT 1 MARKET
All Qualities of Wood Ob-
tained in Substantial
A Building block, made by a
tpecial process to remove approxi-
mately HO per cent of it* weight
but having sufficient hardness to
produce, adequate compression
Btiangih Rnd comparatively low
absorption qualities, Is being made
unci has been placed on the mar-
t»v the Kalumazoo Cement
Products Company located on Al-
cott and Portage streets. The new
product is known as Pottsco.
In special tests the blocks have
been found suitable for nailing,
pawing and boring. Its tenacity
quality for retaining nails have
■proved bv tests to be superior to
that of wood. In this test 8T> nails
were driven into a 2x4 pino tim-
ber and required an avererage pull
of 140 pounds for extraction,
whereas the same number of nails
driven into the Pottsco blocks re-
quired an average pull of 145
pounds, according to Lester R.
Hya". manager of the company.
Mr. Ryan also says that these
Mock units may be easily and
quickly sawed on any angle with
L. A. Schoolmaster
Sanitary Plum bins and
1108 S. Westnedjce Ave.
any type of saw with no disastrous
results to the saw; and that boles
may be bored with ordinary tools
and even lag screws applied with
no ill effect to the brick.
The tiro resisting qualities of the
product is high, as has been de-
termined by the Robert W. Hunt,
Engineers, whose reports, after a
lei>t made, states that "the area
In immediate contact with the
flame came to a bright chrry red
which is generally considered* 1A-
dictatlve of a temperature of about
1,500 degrees Fahrenheit. The
other face of the block was then
not too hot to be touched by the
hand. While under these condi-
tions the blocks were deluged with
cold water; No cracking or scal-
ing off of the blocks was apparent
from the heat or from the cool-
ing of the water."
The sound-deadening qualities of
the product, determined by a test
made by the Riverbank Laborator-
ies of Geneva, Illinois, reveals an
avcrago reduction over the entire
range of tones of 45.7 units, while
a reduction of only ttO sensation
units would be necessary to reduce
a sound of ordinary conversational
loudness to inaudibility.
In a freezing and thawing tests
made by the University of Wiscon-
sin from January, 1929 to March
2t>, 19 29 showed that though there
was some surface deterioration to
a depth of only 1-ln of an inch
or lo*s, this did not show up until
about 90 reversals had been made.
Other tests made reveal the av-
erage compression strength of the
units to approximate between 9 00
and 1,200 pounds per square inch.
Though the product is new to
lyalamazoo it has been manufac-
tured by plants in Wisconsin for
some time. Slag is used in its
manufacture and a chemical an-
alysis shows the block to contain
lime, silica, alumina, manganese,
. , *
All lend compounds are poison-
: < 1 1 1 ! 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 M i r 1 1 1 1
DeBruin's Busin ess Six
Years Old; Has Special
Game Fish Permit.
R. P .WARNER & SON
Agents for Century Electric
Motors. 1-30 h.p. to 250 h.p.
4- Hour Varnishe
Sand Pails and Shovels If
Scooters, $3 M up
So great has been the demand
live bait by fishermen this
Jring that Jake DeBririn, bait
frter at 1501 South Westncdge
•eet, is finding it difficult to keep
11 with the demand in spite of the
mjt that he leases two ponds for
live bait and covers a radius of
40 miles for bait, lie is at present
considering getting gold fish to
keep up with this demand.
Mr. DeBruin has one of the nu
modern, live bait establishments
Michigan. On his property
Wcstnedge street he has
structed a roofed-in minnow
the base of which is bol
water level of Ax tell c re-
runs through the propr
creek furnishes a coru-tn
tlon of water through
The minnows s»i p
types and run n
down in >:'/
leased In ..
County I - -
force. I In
nets as each net pulls
to three hundred mln
BARS ST. JOE
Further evidence o
manship is the sign
placed in his minnow
roads: "Xoticc: No
r<> Residents of t*t
This county docs •
ing with minnow
that county, In
All types of
by him incl
The Kalamazoo Gazette
Monday, July 8, 1929.
■ Ai>LKY F. FMKMAJV
DONALD U. MWKKT
OIOBOI M. ALAU1M HT
MAM la JAUH
FVueemam and Sweet
TK> Sot TH LaMaIXK HTHKKT
I B LL1NOI8
DONALD m. <WKIT
MA NO |_ JAMB
rUBKMAN am ALBI
August 7, 1931.
Harry H. Potts, Esqulr-
201 Horth Aells Strei •
Dear Mr. iotts:
It is a pleasure to notify you of
issuing of United States
'66 on August , based on
r ent ol ht-wei ^llt eSploy-
mulated slag a t r e em ^ io y-
•* ^ 1 'we'toVtr We f 1 : 3 ' -° ach -
„ere tne or -"Ion that you
•eight concrete made from an-. S^i-
gate. It Is a Dlf»; JS ur« ™* ' sla e a €gre-
Uf «n aggre-
•"• ; :-.:::,. .■;.;, .• , ■.;■•-'•: :^J"52
the Straut patent to K^V^T^ ^
Youi *s very t.
New U. S. Post Office
POTTSCO floor-fill used throughout
mi^|^|fe brick used
Foundry - PC1 for all walls.
re ^en c L e ° ba<*-up
PUTTSCO back-up units
Horth Kuskc^rm.Mi^ School>
Duplex Residence of B. H. Schoorthoven
ready for application Fortlpnd
Cement Stucco direct on PCTTSCO
back-up units —
i in pi ci
Milwaukee U i .-or;: 1p
, I -
and partition unite used
throughout this xnr»dem service e'
A magnified granule of
Asphalt composition siding nailed directly
to POTTSCO back-up blocks—
A typical standard
4" x 8" x 16" POTTSCO building
Specimen section showing POTTSCO
light-weight concrete for fire-proofing
steel columns, saving dead weight
and increasing fire protection —